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本文基于以下版本：


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<!--  对应的是3.3.0版本的jedis（redis的java客户端） -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>2.4.0</version>
</dependency>"><meta property="og:type" content="article"><meta property="og:url" content="https://lewky.cn/posts/spring-data-redis/"><meta property="og:image" content="https://lewky.cn/logo.png"><meta property="article:published_time" content="2022-01-13T23:10:42+08:00"><meta property="article:modified_time" content="2022-01-13T23:10:42+08:00"><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="https://lewky.cn/logo.png"><meta name=twitter:title content="Spring Data Redis问题汇总"><meta name=twitter:description content="前言
本文基于以下版本：


1
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<!--  对应的是3.3.0版本的jedis（redis的java客户端） -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>2.4.0</version>
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<a href=https://travellings.link target=_blank class=menu-item rel=noopener title=开往-友链接力><i class="fas fa-fw fa-subway"></i></a><a href=https://rssblog.vercel.app/ class=menu-item target=_blank rel=noopener title=RSSBlog><i class="fas fa-fw fa-inbox"></i></a><a href=https://github.com/lewky class=menu-item target=_blank rel=noopener title=GitHub><i class="fab fa-fw fa-github"></i></a></div></div></header><div class="search-dropdown desktop"><div id=search-dropdown-desktop></div></div><div class="search-dropdown mobile"><div id=search-dropdown-mobile></div></div><main class=main><div class=container><div class=toc id=toc-auto><h2 class=toc-title>目录</h2><div class=toc-content id=toc-content-auto></div></div><article class="page single"><h1 class="single-title animated flipInX">Spring Data Redis问题汇总</h1><div class=post-meta><div class=post-meta-line><span class=post-author><a href=/ title=Author rel=author class=author><i class="fas fa-user-circle fa-fw"></i>雨临Lewis</a></span>&nbsp;<span class=post-category>收录于 <a href=/categories/%E5%B7%A5%E4%BD%9C%E8%AE%B0%E5%BD%95/><i class="far fa-folder fa-fw"></i>工作记录</a></span></div><div class=post-meta-line><i class="far fa-calendar fa-fw"></i>&nbsp;<time datetime=2022-01-13>2022-01-13</time>&nbsp;<i class="far fa-calendar-plus fa-fw"></i>&nbsp;<time datetime=2022-01-13>2022-01-13</time>&nbsp;<i class="fas fa-pencil-alt fa-fw"></i>&nbsp;约 854 字
<i class="far fa-clock fa-fw"></i>&nbsp;预计阅读 2 分钟&nbsp;<span id=/posts/spring-data-redis/ class=leancloud_visitors data-flag-title="Spring Data Redis问题汇总">
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<a href=#comments id=post-meta-vcount title=查看评论><i class="fas fa-comment fa-fw"></i>&nbsp;<span id=/posts/spring-data-redis/ class=waline-comment-count></span>&nbsp;条评论</a></div></div><div class="details toc" id=toc-static kept><div class="details-summary toc-title"><span>目录</span>
<span><i class="details-icon fas fa-angle-right"></i></span></div><div class="details-content toc-content" id=toc-content-static><nav id=TableOfContents><ol><li><a href=#前言>前言</a></li><li><a href=#springboot配置redis>SpringBoot配置Redis</a></li><li><a href=#redistemplate存储数据到redis后key值出现xacxedx00x05>RedisTemplate存储数据到Redis后key值出现<code>\xac\xed\x00\x05</code></a></li><li><a href=#redis宕机导致cacheable直接抛出异常服务不可用>Redis宕机导致@Cacheable直接抛出异常，服务不可用</a></li><li><a href=#参考链接>参考链接</a></li></ol></nav></div></div><div class=content id=content><h2 id=前言>前言</h2><p>本文基于以下版本：</p><div class=highlight><div class=chroma><table class=lntable><tr><td class=lntd><pre class=chroma><code><span class=lnt>1
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</span></code></pre></td><td class=lntd><pre class=chroma><code class=language-xml data-lang=xml><span class=c>&lt;!--  对应的是3.3.0版本的jedis（redis的java客户端） --&gt;</span>
<span class=nt>&lt;dependency&gt;</span>
    <span class=nt>&lt;groupId&gt;</span>org.springframework.boot<span class=nt>&lt;/groupId&gt;</span>
    <span class=nt>&lt;artifactId&gt;</span>spring-boot-starter-data-redis<span class=nt>&lt;/artifactId&gt;</span>
    <span class=nt>&lt;version&gt;</span>2.4.0<span class=nt>&lt;/version&gt;</span>
<span class=nt>&lt;/dependency&gt;</span>
</code></pre></td></tr></table></div></div><h2 id=springboot配置redis>SpringBoot配置Redis</h2><div class=highlight><div class=chroma><table class=lntable><tr><td class=lntd><pre class=chroma><code><span class=lnt> 1
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spring.redis.host=localhost
spring.redis.port=6379

## 是否使用redis作为cache
#spring.cache.type=none
spring.cache.type=redis

## 默认情况下redis中的数据永不过期
#spring.cache.redis.time-to-live=30s

## 是否存储null值
#spring.cache.redis.cache-null-values=false

## key是否使用前缀
#spring.cache.redis.use-key-prefix=true
#spring.cache.redis.key-prefix=tb-
</code></pre></td></tr></table></div></div><h2 id=redistemplate存储数据到redis后key值出现xacxedx00x05>RedisTemplate存储数据到Redis后key值出现<code>\xac\xed\x00\x05</code></h2><p>由于SpringData的redis模块用的是jedis包，因此在使用RedisTemplate操作数据时，默认使用的是JDK的序列化器<code>JdkSerializationRedisSerializer</code>。当存入数据到Redis后，原本的String类型或者Hash类型的key值就会变成带有<code>\xac\xed\x00\x05</code>前缀的值。</p><p>建议对于String、hash类型的值，使用String序列化器：</p><div class=highlight><div class=chroma><table class=lntable><tr><td class=lntd><pre class=chroma><code><span class=lnt> 1
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</span></code></pre></td><td class=lntd><pre class=chroma><code class=language-java data-lang=java><span class=nd>@EnableCaching</span>
<span class=nd>@Configuration</span>
<span class=kd>public</span> <span class=kd>class</span> <span class=nc>RedisConfig</span> <span class=o>{</span>

    <span class=nd>@Bean</span>
    <span class=kd>public</span> <span class=n>RedisTemplate</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;</span> <span class=nf>redisTemplate</span><span class=o>(</span><span class=kd>final</span> <span class=n>RedisConnectionFactory</span> <span class=n>redisConnectionFactory</span><span class=o>)</span> <span class=o>{</span>
        <span class=kd>final</span> <span class=n>RedisTemplate</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;</span> <span class=n>template</span> <span class=o>=</span> <span class=k>new</span> <span class=n>RedisTemplate</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;();</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setConnectionFactory</span><span class=o>(</span><span class=n>redisConnectionFactory</span><span class=o>);</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setEnableDefaultSerializer</span><span class=o>(</span><span class=kc>false</span><span class=o>);</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setKeySerializer</span><span class=o>(</span><span class=n>RedisSerializer</span><span class=o>.</span><span class=na>string</span><span class=o>());</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setValueSerializer</span><span class=o>(</span><span class=n>RedisSerializer</span><span class=o>.</span><span class=na>java</span><span class=o>());</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setHashKeySerializer</span><span class=o>(</span><span class=n>RedisSerializer</span><span class=o>.</span><span class=na>string</span><span class=o>());</span>
        <span class=n>template</span><span class=o>.</span><span class=na>setHashValueSerializer</span><span class=o>(</span><span class=n>RedisSerializer</span><span class=o>.</span><span class=na>string</span><span class=o>());</span>
        <span class=n>template</span><span class=o>.</span><span class=na>afterPropertiesSet</span><span class=o>();</span>

        <span class=k>return</span> <span class=n>template</span><span class=o>;</span>
    <span class=o>}</span>

<span class=o>}</span>
</code></pre></td></tr></table></div></div><h2 id=redis宕机导致cacheable直接抛出异常服务不可用>Redis宕机导致@Cacheable直接抛出异常，服务不可用</h2><p>当使用@Cacheable来将数据存入Redis时，如果Redis服务器不可达会导致系统直接抛出异常，从而使得服务不可用，正常来说就算Redis挂了也不应该影响原本的业务逻辑的正常运行下去。</p><p>需要写一个CacheErrorHandler来对上述异常进行处理：</p><div class=highlight><div class=chroma><table class=lntable><tr><td class=lntd><pre class=chroma><code><span class=lnt> 1
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</span><span class=lnt>36
</span><span class=lnt>37
</span></code></pre></td><td class=lntd><pre class=chroma><code class=language-java data-lang=java><span class=nd>@EnableCaching</span>
<span class=nd>@Configuration</span>
<span class=nd>@Slf4j</span>
<span class=kd>public</span> <span class=kd>class</span> <span class=nc>RedisConfig</span> <span class=kd>extends</span> <span class=n>CachingConfigurerSupport</span> <span class=o>{</span>

    <span class=cm>/*
</span><span class=cm>     * (non-Javadoc)
</span><span class=cm>     * @see org.springframework.cache.annotation.CachingConfigurerSupport#errorHandler()
</span><span class=cm>     */</span>
    <span class=nd>@Override</span>
    <span class=kd>public</span> <span class=n>CacheErrorHandler</span> <span class=nf>errorHandler</span><span class=o>()</span> <span class=o>{</span>

        <span class=k>return</span> <span class=k>new</span> <span class=n>CacheErrorHandler</span><span class=o>()</span> <span class=o>{</span>

            <span class=nd>@Override</span>
            <span class=kd>public</span> <span class=kt>void</span> <span class=nf>handleCachePutError</span><span class=o>(</span><span class=kd>final</span> <span class=n>RuntimeException</span> <span class=n>exception</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Cache</span> <span class=n>cache</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Object</span> <span class=n>key</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Object</span> <span class=n>value</span><span class=o>)</span> <span class=o>{</span>
                <span class=n>log</span><span class=o>.</span><span class=na>error</span><span class=o>(</span><span class=s>&#34;Failed to put key &#39;{}&#39; into Redis Cache: {}.&#34;</span><span class=o>,</span> <span class=n>key</span><span class=o>,</span> <span class=n>cache</span><span class=o>.</span><span class=na>getName</span><span class=o>(),</span> <span class=n>exception</span><span class=o>);</span>
            <span class=o>}</span>

            <span class=nd>@Override</span>
            <span class=kd>public</span> <span class=kt>void</span> <span class=nf>handleCacheGetError</span><span class=o>(</span><span class=kd>final</span> <span class=n>RuntimeException</span> <span class=n>exception</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Cache</span> <span class=n>cache</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Object</span> <span class=n>key</span><span class=o>)</span> <span class=o>{</span>
                <span class=n>log</span><span class=o>.</span><span class=na>error</span><span class=o>(</span><span class=s>&#34;Failed to get key &#39;{}&#39; from Redis Cache: {}.&#34;</span><span class=o>,</span> <span class=n>key</span><span class=o>,</span> <span class=n>cache</span><span class=o>.</span><span class=na>getName</span><span class=o>(),</span> <span class=n>exception</span><span class=o>);</span>
            <span class=o>}</span>

            <span class=nd>@Override</span>
            <span class=kd>public</span> <span class=kt>void</span> <span class=nf>handleCacheEvictError</span><span class=o>(</span><span class=kd>final</span> <span class=n>RuntimeException</span> <span class=n>exception</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Cache</span> <span class=n>cache</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Object</span> <span class=n>key</span><span class=o>)</span> <span class=o>{</span>
                <span class=n>log</span><span class=o>.</span><span class=na>error</span><span class=o>(</span><span class=s>&#34;Failed to evict key &#39;{}&#39; from Redis Cache: {}.&#34;</span><span class=o>,</span> <span class=n>key</span><span class=o>,</span> <span class=n>cache</span><span class=o>.</span><span class=na>getName</span><span class=o>(),</span> <span class=n>exception</span><span class=o>);</span>
                <span class=k>throw</span> <span class=n>exception</span><span class=o>;</span>
            <span class=o>}</span>

            <span class=nd>@Override</span>
            <span class=kd>public</span> <span class=kt>void</span> <span class=nf>handleCacheClearError</span><span class=o>(</span><span class=kd>final</span> <span class=n>RuntimeException</span> <span class=n>exception</span><span class=o>,</span> <span class=kd>final</span> <span class=n>Cache</span> <span class=n>cache</span><span class=o>)</span> <span class=o>{</span>
                <span class=n>log</span><span class=o>.</span><span class=na>error</span><span class=o>(</span><span class=s>&#34;Failed to clear Redis Cache: {}.&#34;</span><span class=o>,</span> <span class=n>cache</span><span class=o>.</span><span class=na>getName</span><span class=o>(),</span> <span class=n>exception</span><span class=o>);</span>
            <span class=o>}</span>
        <span class=o>};</span>
    <span class=o>}</span>
<span class=o>}</span>
</code></pre></td></tr></table></div></div><h2 id=参考链接>参考链接</h2><ul><li><a href=https://blog.csdn.net/hunger_wang/article/details/118713579 target=_blank rel="noopener noreffer">RedisTemplate写入Redis数据出现无意义乱码前缀\xac\xed\x00\x05</a></li><li><a href=https://www.jb51.net/article/205878.htm target=_blank rel="noopener noreffer">Spring @Cacheable redis异常不影响正常业务方案</a></li></ul><div class=post-reward><input type=checkbox name=reward id=reward hidden>
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